The world's largest, and most controversial arms fair opened its doors in London today, showcasing the latest defence technology.
The threat of U.S military action in Syria hangs heavy over this year's event, with protesters saying London has a moral duty not to host the exhibition. From there our Political Correspondent Simon Harris reports.
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Police were called to a fight between two groups of people on the petrol station forecourt at Cobham services.
The barriers are part of a series of measures put in place by the Metropolitan Police.
Resident group Justice 4 Grenfell say they were not consulted and will raise concerns about the appointment at the highest level.